//
//  BinaryFloatingPointExtension.swift
//
//  SlidingRuler
//
//  MIT License
//
//  Copyright (c) 2020 Pierre Tacchi
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//  SOFTWARE.
//


import Foundation

extension BinaryFloatingPoint {
    mutating func approximate() { self = approximated() }
    func approximated() -> Self { (self * 1_000_000).rounded() / 1_000_000 }

    func nearestBound(of range: ClosedRange<Self>, equality: Bool = false) -> Self {
        let deltaLow = self - range.lowerBound
        let deltaUp = range.upperBound - self

        if deltaUp == deltaLow {
            return !equality ? range.lowerBound : range.upperBound
        } else {
            return deltaLow < deltaUp ? range.lowerBound : range.upperBound
        }
    }
}
